12 papers
Dynamical Tidal Response of Neutron Stars: from Effective Field Theory to Gravitational Waveforms
Thomas Apostolidis, Valerio De Luca, Leonardo Gualtieri +3
We investigate the fully relativistic dynamical tidal response of neutron stars up to second order in the frequency. Combining the worldline effective field theory for extended gra…
Quasinormal modes and tidal responses of black holes in generic anisotropic matter environments
Yu-Qian Zhao, Paolo Pani
We develop a perturbative framework for a black hole embedded in a generic, possibly anisotropic, matter environment under spherical symmetry. Our approach extends previous analyse…
Modeling the frequency-domain ringdown amplitude of comparable-mass mergers with greybody factors
Romeo Felice Rosato, Sophia Yi, Emanuele Berti +1
It was recently shown that, in a binary coalescence, the greybody factor of the remnant black hole modulates the post-merger ringdown signal. In this work, we demonstrate that a si…
Excitation factors for horizonless compact objects: long-lived modes, echoes, and greybody factors
Romeo Felice Rosato, Shauvik Biswas, Sumanta Chakraborty +1
We present an analytical and numerical investigation of the quasinormal excitation factors of ultracompact horizonless objects. These systems possess long lived quasinormal modes w…
On the universality of late-time ringdown tail
Romeo Felice Rosato, Paolo Pani
The late time response of vacuum black holes in General Relativity is notoriously governed by power law tails arising from the wave scattering off the curved spacetime geometry far…
Greybody factors, reflectionless scattering modes, and echoes of ultracompact horizonless objects
Romeo Felice Rosato, Shauvik Biswas, Sumanta Chakraborty +1
Motivated by a recently discovered connection between the greybody factors of black holes and the ringdown signal, we investigate the greybody factors of ultracompact horizonless o…